package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

/**
 * Author: Zheng
 * Date:   2024/2/18  22:02
 * Package：com.sky.aspect
 * Description：自定义切面类，处理公共字段填充逻辑
 * Version：1.0
 */
@Aspect
@Component
@Slf4j
public class AutoFillAspect {

    /**
     * @description： 切入点
     * @date：2024/2/18 22:34
     * @return：
     **/
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && " +
            " @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointCut() {
    }

    ;

    /**
     * @description： 前置通知，在通知中进行公共字段赋值
     * @date：2024/2/18 22:37
     * @return：
     **/
    @Before("autoFillPointCut()")
    public void autoFill(JoinPoint joinPoint) {
        log.info("开始公共字段填充。。。。");
        //获取方法签名
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        //通过方法获取方法上注解对象
        AutoFill autoFill = signature.getMethod().getAnnotation(AutoFill.class);
        OperationType operationType = autoFill.value();
        Object[] args = joinPoint.getArgs();
        if (args == null || args.length == 0) {
            return;
        }

        Object entity = args[0];
        LocalDateTime now = LocalDateTime.now();
        Long currentId = BaseContext.getCurrentId();

        if (operationType == OperationType.INSERT) {
            //新增要填充4个字段

            try {
                Method setCreateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method setCreateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                setCreateTime.invoke(entity,now);
                setCreateUser.invoke(entity,currentId);
                setUpdateTime.invoke(entity,now);
                setUpdateUser.invoke(entity,currentId);
            }catch (Exception e){
                log.error("公共字段填充失败！？！...");
                e.printStackTrace();
            }
        } else if (operationType == OperationType.UPDATE) {
            //修改要填充2个字段
            try {
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                setUpdateTime.invoke(entity,now);
                setUpdateUser.invoke(entity,currentId);
            }catch (Exception e){
                log.error("公共字段填充失败！？！...");
                e.printStackTrace();
            }

        }
    }
}
